Abstract: The Invention is a window blind with an integral, adjustable light shelf to control the entry of light into a room through a window. The blind may be a roller blind or any other suitable blind and controls entry of light through a lower portion of the window. The light shelf controls entry of light through an upper portion of the window and may be adjusted to reflect incident sunlight onto the ceiling of the room to provide indirect lighting to the room. The light shelf may be adjusted to substantially or partially exclude light from the room.

Abstract: An apparatus is provided for drawing a flexible cover over an upwardly open container body having an upper edge. The apparatus includes a flexible cover of a size to substantially cover the open container body and fixed at one end of the container body by a cover support for retraction and extension over the open container body. A pair of arms is each pivotally mounted at a fixed end to the container body. Each arm has a free end opposite the fixed end attached to an edge of the flexible cover and configured such that movement of the arms causes movement of the cover over the open container body. Each arm has a hollow, longitudinally extending, tabular member having at least one and preferably two stiffening fins extending longitudinally along substantially the length of the tubular member. The fins are integrally formed with and attached to the tubular member, preferably as an extrusion of an aluminum material to form a single, unitary body.